Optical fiber microresonators have attracted considerable interest for acoustic detection because of their compact size and high optical quality.Here,we have proposed,designed,and fabricated a spring-based Fabry-P...Optical fiber microresonators have attracted considerable interest for acoustic detection because of their compact size and high optical quality.Here,we have proposed,designed,and fabricated a spring-based Fabry-Pérot cavity microresonator for highly sensitive acoustic detection.We observed two resonator vibration modes:one relating to the spring vibration state and the other determined by the point-clamped circular plate vibration mode.We found that the vibration modes can be coupled and optimized by changing the structure size.The proposed resonator is directly 3D printed on an optical fiber tip through two-photon polymerization and is used for acoustic detection and imaging.The experiments show that the device exhibits a high sensitivity and low noise equivalent acoustic signal level of 2.39 mPa∕Hz^(1∕2)at 75 kHz that can detect weak acoustic waves,which can be used for underwater object imaging.The results demonstrate that the proposed work has great potential in acoustic detection and biomedical imaging applications.展开更多
A high-birefringence spiral Sagnac waveguide(SSW)device fabricated via direct laser writing(DLW)using a two-photon polymerization(2PP)technique is proposed,designed,and experimentally demonstrated as an ultrahigh magn...A high-birefringence spiral Sagnac waveguide(SSW)device fabricated via direct laser writing(DLW)using a two-photon polymerization(2PP)technique is proposed,designed,and experimentally demonstrated as an ultrahigh magnetic field sensor.The sensor comprises a Y-style tapered waveguide and an SSW containing two microfluidic channels.The SSW has a total length of∼2.4 mm and a spiral radius of∼200μm.Due to the asymmetric structure,the SSW has a high birefringence of 0.016,which can be designed as a magnetic field sensor,as a magnetic fluid can be filled into the microfluidic channel changing the guiding mode and the birefringence and consequently leading to a change in phase of the interferometer when the applied magnetic field changes.The experimental results show that the proposed photonic device has a sensitivity to magnetic fields as high as 0.48 nm/Oe within a range from 10 to 100 Oe.The proposed device is very stable and easy to fabricate,and it can therefore be used for weak magnetic field detection.展开更多
基金National Natural Science Foundation of China(62005153,12174245)Natural Science Foundation of Shanghai(20ZR1420300)National Key Research and Development Program of China(2022YFF0708400)。
文摘Optical fiber microresonators have attracted considerable interest for acoustic detection because of their compact size and high optical quality.Here,we have proposed,designed,and fabricated a spring-based Fabry-Pérot cavity microresonator for highly sensitive acoustic detection.We observed two resonator vibration modes:one relating to the spring vibration state and the other determined by the point-clamped circular plate vibration mode.We found that the vibration modes can be coupled and optimized by changing the structure size.The proposed resonator is directly 3D printed on an optical fiber tip through two-photon polymerization and is used for acoustic detection and imaging.The experiments show that the device exhibits a high sensitivity and low noise equivalent acoustic signal level of 2.39 mPa∕Hz^(1∕2)at 75 kHz that can detect weak acoustic waves,which can be used for underwater object imaging.The results demonstrate that the proposed work has great potential in acoustic detection and biomedical imaging applications.
基金Natural Science Foundation of Zhejiang Province(LY17F030010)National Natural Science Foundation of China(62005153)+2 种基金Natural Science Foundation of Shanghai(20ZR1420300)STCSM(SKLSF02020-01)Major Scientific Facilities Project Funding in Zhejiang Lab(2019MB0AD01).
文摘A high-birefringence spiral Sagnac waveguide(SSW)device fabricated via direct laser writing(DLW)using a two-photon polymerization(2PP)technique is proposed,designed,and experimentally demonstrated as an ultrahigh magnetic field sensor.The sensor comprises a Y-style tapered waveguide and an SSW containing two microfluidic channels.The SSW has a total length of∼2.4 mm and a spiral radius of∼200μm.Due to the asymmetric structure,the SSW has a high birefringence of 0.016,which can be designed as a magnetic field sensor,as a magnetic fluid can be filled into the microfluidic channel changing the guiding mode and the birefringence and consequently leading to a change in phase of the interferometer when the applied magnetic field changes.The experimental results show that the proposed photonic device has a sensitivity to magnetic fields as high as 0.48 nm/Oe within a range from 10 to 100 Oe.The proposed device is very stable and easy to fabricate,and it can therefore be used for weak magnetic field detection.
